ASoC: SDCA: Add allocation failure check for Entity name

Currently find_sdca_entity_iot() can allocate a string for the
Entity name but it doesn't check if that allocation succeeded.
Add the missing NULL check after the allocation.

Fixes: 48fa77a ("ASoC: SDCA: Add terminal type into input/output widget name")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20260303141707.3841635-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: charleskeepax

sound/soc/sdca/sdca_functions.c

@@ -1156,9 +1156,12 @@ static int find_sdca_entity_iot(struct device *dev,
 	if (!terminal->is_dataport) {
 		const char *type_name = sdca_find_terminal_name(terminal->type);
 
-		if (type_name)
+		if (type_name) {
 			entity->label = devm_kasprintf(dev, GFP_KERNEL, "%s %s",
 						       entity->label, type_name);
+			if (!entity->label)
+				return -ENOMEM;
+		}
 	}
 
 	ret = fwnode_property_read_u32(entity_node,